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You should call it "Viking disease" - sounds more impressive

MX reds might be something to look at, they are the lightest commonly available MX switches. You could even swap (or have someone swap for you) springs to even lighter ones.
MX switches have 4mm travel distance, and all actuate after 2mm. You can reduce the total travel by installing O-rings, which are rubber rings that cushion the downstroke somewhat, reduce bottoming out sound, and reduce the downward travel distance. The switches do still take 2mm to actuate though.
Alternatively there are tales of 30g Topre switches, although I'm not sure which keyboards are available with those, and it is extremely unlikely that you'd find a Topre keyboard with all the characteristics you seek.
There is an extensive
ergonomics section, and many knowledgable people here
